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Une sélection de projets en cours

Avec une sélection de projets en cours, nous voulons vous informer des sujets actuels. Si vous trouvez des synergies avec nos activités, nous serions heureux que vous nous contactiez.

Vous pouvez remarquer que pour des raisons de confidentialité, seuls les projets à caractère public y sont cités. Les projets avec et pour des commettants privés doivent respecter le secret professionnel.

Voir aussi nos projets précédents.

LegioSafe – Legionella Safety in Solar Thermal Systems

Within the project LegioSafe, literature and state of knowledge on Legionella safety in solar thermal systems (status 2018) are analysed and summarized in a report.

SPF contact person

Final report (PDF, German)

VenTSol – Evaluation of user behaviour with regard to ventilation, shading and room temperature depending on the outdoor climate

In the VenTSol project, the behaviour of residents with regard to window ventilation, shading and room temperature will be investigated by detailed monitoring of five apartment buildings. This study should help to create detailed user profiles, which can be used for simulations and energy calculations. User behaviour is compared to the prevailing external climate, internal climate and energy consumption. The project should contribute to a better understanding of the so-called «UserGap».

SPF contact person

Hybrid BioVGE – Hybrid Variable Geometry Ejector Cooling and Heating System for Buildings Driven by Solar and Biomass Heat

Within the EU project Hybrid-BioVGE an innovative system for heating and cooling is developed. The cooling device is based on a Variable Geometry Ejection (VGE) cooler. Driving energy is heat from solar collectors or from biomass. SPF is supporting the development of collectors that deliver heat at 75 – 90 °C, and is testing the heating and cooling system with the established Concise Cycle Test (CCT) method. This method is specifically adapted in order to be able to test also cooling systems.

The project is supported by the research programme H2020 of the European Union – grant agreement ID: 818012, acronym Hybrid-BioVGE

SPF contact person

http://hybrid-biovge-project.eu

KlimaGapLite – Literature study on different weather correction methods

In the SFOE project ImmoGap it was found that the choice of the method for weather correction of the energy monitoring data can have a strong influence on the determination of the performance gap. For this reason, a literature study on different weather correction methods was done for the SFOE and further research needs were identified. The literature study shows that the current situation regarding the weather correction of energy monitoring data is not satisfying.

SPF contact person

Final report (PDF, German)

H2020-TRI-HP – Trigeneration systems based on heat pumps with natural refrigerants and multiple renewable sources

The overall goal of the TRI-HP project is the development and demonstration of flexible energy-efficient and affordable trigeneration systems. The systems will be based on electrically driven natural refrigerant heat pumps coupled with renewable electricity generators (PV), using cold (ice slurry), heat and electricity storages to provide heating, cooling and electricity to multi-family residential buildings with a self-consumed renewable share of 80 %. The innovations proposed will reduce the system cost by at least 10 - 15 % compared to current heat pump technologies with equivalent energetic performances. Two natural refrigerants with very low global warming potential, propane and carbon dioxide, will be used as working fluids.

The project is lead by SPF and supported by the research programme H2020 of the European Union – grant agreement ID: 814888

SPF contact person

HybridStock – Energy Storage in Aluminium

Seasonal energy storage is one of the largest challenges of the energy turnaround. In the project HybridStock, the seasonal storage of renewable energy in aluminium is investigated. At times of high availability of electricity from renewable sources, this energy is converted to chemical energy and stored in elementary aluminium. In winter, chemical energy from the oxidation reaction of aluminium is used to produce heat and electricity.

In this project the concept which was the subject of the feasibility study HePoStAl is further pursued through laboratory work and the construction of prototypes.

SPF contact person

16 A-Buildings – Power grid stabilisation and influencing users through electrical power limitation for buildings

Limiting the electrical purchase and feed-in power of buildings to a low level is attractive for grid stability. Because of this limitation, the building's own solar power consumption would be optimised, the PV system output limited, peak demand reduced and, if necessary, an electric energy storage installed. Due to the different interests of the stakeholders, the advantages and disadvantages of the new technical concepts for the power limitation must be examined. The feasibility of such a concept will be investigated by means of simulations.

SPF contact person

Final report (PDF, German)

Big-Ice – Assessment of solar-ice systems for multi-family buildings

The overall goal of the project is to assess and quantify the potentials of solar-ice systems for multi-family buildings with the possibility to include cooling demands. Special emphasis will be given in quantifying the energy performance using different hydraulic configurations and weather data sets on several Swiss locations. Hundreds of parametric transient dynamic simulations in TRNSYS will be used to quantify the system performance factor under different boundary conditions. The project also aims to develop fast algorithm tools for feasibility checks purposes using machine-learning algorithms trained with TRNSYS simulations.

SPF contact person

Slurry HP II – Super-cooling ice slurry heat pumps for solar heating applications

The idea behind this project is to use the supercooling ice slurry method for solar heating applications. This innovative concept could provide a breakthrough in solar and heat pump systems with ice storages by reducing the cost of the system by 10 %. The cost reduction would be achieved by eliminating the heat exchangers from the ice storage and storing ice in the form of slurry. The slurry HP II project aims to proof the concept of heat exchangers operated with supercooled water using ice repellent coatings.

SPF contact person

cpExact – Measuring of heat capacity of liquid heat carriers

In this project a calorimeter was built for the measurement of the specific heat cp of heat transfer fluids with a measurement uncertainty of ±0.3 %.
The apparatus will be used for quality assurance at the SPF and is available for measuring fluids of third parties as well. This brings significant advantages for manufacturers and suppliers of heat transfer fluids that can deliver physical properties of their fluids with higher accuracy, for facility operators of large systems that can survey the energy balance of their systems with higher accuracy, and for researchers and developers that may determine more accurately the energy balance of prototype systems that use heat transfer media other than water.

SPF contact person

Final report (PDF, German)

HePoStAl – Heat and Power Storage in Aluminum

In this applied Research Project the SPF Institute for Solar Technology carried out a feasibility study for the storage of solar energy in an aluminum redox cycle. Alumina (aluminum oxide) can be converted to elementary aluminum with an electrolysis smelter process that consumes electricity from solar or other renewable sources, and this elementary aluminum can then be transported to the point of use where it is used for the production of heat and electricity in buildings or industrial processes.

SPF contact person

Final report (PDF)

OpEEr – Benefits of room temperature controllers

Studies on individual room control and the so-called self-regulating effect (ErrEnEff project) were extended from single-family houses to multi-family houses.Three different room temperature control variants were evaluated and compared in terms of final energy demand, living comfort and economic efficiency. For this purpose, a reference building that corresponds to an average Swiss apartment building, was designed in IDA ICE. Parallel to the room control, the differing heat demand of apartments at the top and on the ground floor compared to apartments in the middle was also investigated for the case that they have identical or differing room temperature set points.

OpEEr is supported by the Swiss Federal Office of Energy (SFOE).

SPF contact person

Final report (PDF, German)

BigStrat – Stratification of Large Thermal Storage Tanks

A combination of measurements from seven field systems and simulations of systems with large thermal storage tanks was used in order to derive rules for the extrapolation of design rules that lead to good thermal stratification from small (800 l) sized tanks to large (up to 200 m³) tank sizes. In addition, a deflection relation was defined that allows for the prediction of the preservation of existing stratification depending on the distance to the next obstacle in the storage tank, when fluid is entering vertically or via an elbow pipe in the direction of the storage tank cover.

SPF contact person

Final report (PDF, German)

ProsumerSkin – New solution for renovation of multifamily buildings

This pilot and demonstration project shows new ways for the cost-efficient renovation of multifamily houses to «nearly zero energy» buildings. The core components are multifunctional facade elements which, in addition to thermal insulation and windows with integrated comfort ventilation, contain both power generation with photovoltaics and the distribution of space heating. In a first phase of the project, the building physics fundamentals are analyzed and the feasibility is demonstrated with a prototype and simulations. In a second phase, a multifamily building in Bern will be renovated with this new concept.

SPF contact person

Flyer ProsumerSkin (PDF, German)

OblaTherm – PVT and foundation slab as a heat source and sink

For the new building of Oblamatik AG in Chur, a heating and cooling concept that is unique in Switzerland was developed. Using the foundation slab as a heat sink and heat source represents an alternative to the current heating systems for office buildings. The regeneration of the foundation slab in winter as well as in summer is mainly guaranteed by PVT collectors. The HVAC concept is designed to use as much of the internal heat (servers, commercial refrigeration, etc.) as possible directly for heating purposes.

SPF contact person

Paper Brenet Status-Seminar 2018 (PDF, German)

Sol-Ind Swiss – Solar process heat in the Swiss market

In Switzerland the industry share of the total energy demand is 19 %. Half of this energy is used for the conversion to process heat and is mainly provided by fossil fuels [SFOE, Swiss national statistics 2014]. In a feasibility study the use of solar process heat by systems with solar thermal collectors therefore shows great potential and will in more detail examine the integration in the energy supply systems. In this study we restrict to a temperature range below 130 °C. For this purpose, it is necessary to identify the Swiss companies, which have the majority of the thermal energy consumption at temperatures below 130 °C. Furthermore, within the framework of the project, standardized system solutions for the planning and integration of a solar thermal system will be developed on the basis of three case studies. The focus lays on the yield calculation of the plant taking the location into account, the costs for the collector field and integration as well as the CO₂ savings by replacing fossil fuels through solar energy.

SPF contact person

Siphon – Recommendation for heat traps of thermal energy storages

The installation of heat traps is state of the art for pipes that are connected to thermal energy storage units but that are not permanently operated, i.e. the fluid in the pipe is not flowing continuously. In this project, the SPF investigates on issues that created uncertainty within the planning and installation community, such as the question of the significance and effect of insulation in the region of the actual heat trap.

SPF contact person

Final report (PDF, German)

Abstorex – Seasonal thermal storage system for solar energy

A 1 kW closed sorption thermal energy storage system (TES) prototype is set-up and tested at HSR-SPF. This can be charged in summer with heat from solar thermal collectors or with electricity from photovoltaic modules. The system can achieve a significantly higher volumetric energy density compared to sensible hot water storage. The closed sorption system is designed to work with different sorbent-sorbate pairs (NaOH-H₂O, LiBr-H₂O and LiCl-H₂O). Scaling to larger units with correspondingly higher power will be done in the frame of SCCER HaE (Heat and Electricity).

SPF contact person

PVT Wrap-Up – Energy Systems with Photovoltaic-Thermal Solar Collectors

Photovoltaic-Thermal (PVT) solar collectors simultaneously generate useful solar heat and electricity and thereby reach high area specific energetic yields. In the past few years, an increasing interest in PVT collectors could be observed. New products were developed and brought to the market and, particularly in Switzerland, a number of PVT plants were built. On behalf of EnergieSchweiz (a programme by the Swiss Federal Office of Energy) SPF is leading a study on the current PVT market, the state of the art of PVT technology, and on the experiences made by the various actors that have been involved in the realization of PVT plants.

SPF contact person

Final report (PDF, German)

ErrEnEff – Influence of individual room controllers on the heating demand of a single family house with low temperature heating distribution

In Switzerland standards allow floor heating systems without individual room controllers, as long as the calculated design flow temperature is below 30 °C. The argumentation is that a self-regulating effect comes into operation, because of the low temperature differences between heating surface and air temperatures. In the master thesis of Igor Mojic (part 1), it was investigated, whether the use of thermostatic valves leads to energy savings in the case of heat distribution systems with low flow temperatures. Based on the master thesis a second study was done with inputs from the AWEL Zürich (part 2).

This project is supported by the AWEL Zürich, department of Energy.

SPF contact person

Final report of Master's dissertation (Part 1, PDF German)
Final report (Part 2, PDF German)

Slurry-HP – A feasibility study to use a super-cooling ice slurry heat pump for solar heating applications

The goal of the present project is to analyse the technical and economic feasibility of a solar-ice system based on a super-cooling slurry heat pump. The system should achieve higher electricity savings and overall system performance with a comparable return on investment with respect to state-of-the-art ground source heat pump and solar-ice solutions. The anticipated efficiency increase is based on the super-cooler heat exchanger which is always free of ice. The anticipated cost reduction is based on the use of very simple storage vessels that do not need build-in heat exchangers.

Slurry-HP is financed by the Swiss Federal Office of Energy (SFOE).

SPF contact person

Final report (PDF)

ImmoGap – Influence of user behaviour and building system technologies on the performance gap of large buildings

This project analyses multifamily homes that show a large gap between the predicted and the achieved energy performance, and determines the cause for these performance gaps. The combined effects of user behavior and the building technology and control are analyzed. From this analysis, options for action for planers and pubic authorities are deduced.

ImmoGap is supported by the Swiss Federal Office of Energy (SFOE).

SPF contact person

Final report (PDF, German)

SWSG – Feasibility of solar assisted district heating networks in the canton of St.Gallen

Solar assisted district heating is widely used in countries as Austria, Germany and Sweden and is booming in Denmark. Heat production costs below 0.05 CHF/kWh where recently reached. With this feasibility study district heating networks of the canton of St. Gallen are analyzed in terms of the feasibility and the cost-benefit ratio of an integration of large solar thermal collector field. A further goal is to make contact between collector manufacturers and network operators as well as to initiate the realization of several large collector fields.

SWSG is supported by the canton of St.Gallen and the Swiss Federal Office of Energy (SFOE).

SPF contact person

Final report (PDF, German)

ReSoTech – Reduction of Market Prices of Solar Thermal Systems due to New Technological Approaches – Phase 1: Analysis of Potentials and Possible

The potentials of cost reduction of solar thermal systems will be derived with cost data that will be gathered from field installations. The use of new technologies and materials for the exploitation of relevant potentials for cost reduction will be assessed. System concepts with reduced costs will be designed, which will contain newly developed components and which will have a high degree of faultlessness during installation and operation.

This project is financed by the Swiss Federal Office of Energy (SFOE).

SPF contact person

Final report (PDF, German)

CombiVolt – Influence of smart heat pumps on PV self-consumption and on the electrical grid

Several companies develop or already offer "smart heat pumps" on the market which combine heat pumps (HP) with photovoltaics (PV). These heat pumps are advertised to optimize self-consumption of the PV electricity as well as to deliver grid services to the utilities. In the CombiVolt project, the influence of intelligent control for heat pumps on both (self-consumption and grid-stability) is analyzed based on whole system testing in the lab in combination with simulations. The options to increase self-consumption by means of electrical or thermal storage are compared. Thereby the current tariff-schemes of today are considered as well as future scenarios for PV penetration and electricity tariffs.

CombiVolt is supported by the Swiss Federal Office of Energy (SFOE).

SPF contact person

SCCER EIP – Industrial process heat with renewable energy sources

In order to push the energy transition seven Swiss Competence Centers for Energy Research (SCCER) have been launched by the Commission for Technology and Innovation (CTI). One of them, the SCCER EIP (Efficiency of Industrial Processes), focuses on the question of how to support industry to enhance the energy efficiency and reduction of CO₂ emission in order to reach the goals of the Swiss national «Energy Strategy 2050». The SPF is part of this consortium and supports industry partners in better management of energy consumption by energy flow analysis and by the investigation on the integration of renewable energy sources for process heat.

SPF contact person

EvaSP – Evaluation of solar process heat systems

The interest in solar process heat for industrial applications is increasing worldwide. For future perspectives and realization of further solar collector fields an assessment of the current state is necessary.

Within the framework of the project EvaSP (Evaluation of solar process heat systems) funded by the Swiss Federal Office for Energy SFOE, several solar collector fields used for processes heat in different industrial branches are energetically and economically evaluated. This project will give an overview of the performance of these collector fields as well as suggestions for suppliers and planners. Furthermore, the results of this evaluation will aid entrepreneurs and investors in the decision-making process and support the implementation of solar thermal energy in industry.

SPF contact person

SolProof – Compactness and fault resistance of solar heating systems

The competition between photovoltaics and solar thermal systems for available roof area and investment capital of house owners is putting pressure on solar thermal heating systems to reduce cost and to simplify the product. This project aims to assist manufactures in this task. The goal is to reduce the complexity of solar thermal systems, and reduce likelihood of failures during planning and installations. Criteria for defining compactness and fault resistance will be defined and subsequent applied to different heating systems in the test bench. For this purpose, the well-established CCT method will be simplified and combined with the criteria for evaluation of compactness and fault resistance.

This project is financed by the Swiss Federal Office of Energy (SFOE).

SPF contact person

IceEx – Characterization of heat exchanger concepts for ice storages

Ice storages in combination with solar thermal collectors and a heat pump to provide domestic hot water and space heating demands (solar-ice systems) are a promising technology. The project IceEx aims at characterizing heat exchanger concepts for ice storages in solar heating applications. Several heat exchangers, available on the market or recently developed for solar-ice systems, are analyzed by means of experiments and simulations to find an optimum design. Transient yearly simulations are used to assess the system efficiency and energy demand.

This project is financed by the Swiss Federal Office of Energy (SFOE).

SPF contact person

Final report (PDF)

ColourAge – Lifetime assessment of aluminium based absorber coatings

There is a lack of knowledge on the lifetime assessment of modern solar selective absorbers. In the project ColourAge, the performance and durability of different aluminium based coatings are studied. The combined effect of high humidity, condensation and temperature on the degradation of optical and chemical properties is assessed. Advanced techniques for materials characterization were used to identify the main degradation mechanisms: surface/interface (XPS, TEM) and chemical (EDX) analysis, as well as optical measurements (UV-Vis-NIR and FTIR spectroscopy).

SPF contact person

Sotchà – Three different solar assisted heating systems for ground source regeneration

In this P&D project three identical minergie-A multifamily houses where equipped with three different solar assisted heating systems: PV, PVT and solar thermal with flat plate collectors. The heating systems are equipped with ground source heat pumps and controlled by a newly developed predictive and adaptive control. In the buildings with solar thermal plant the ground source is regenerated. The third building with PV and ground source without regeneration serves as a reference system. Temperature sensors at a depth of 50 m, 110 m and 170 m allow the evaluation of temperatures in the ground over time for each of the three borehole fields. The aim of this three years monitoring project is to identify improvements in the entire heating system of all three buildings and investigate the potential of various solar systems regarding the regeneration of ground sources.

SPF contact person

Oberfeld – Large PVT plants for ground source regeneration

In this P&D project the potential of large PVT plants used for ground source regeneration is studied.
The complex Oberfeld consists of three buildings. Each of the three buildings has its separate heating system containing heat pumps, earth probes and a PVT solar plant. The PVT plant is one of the largest of its kind in Switzerland. The entire PVT plant consists of a total of 799 PVT collectors and has an overall area of more than 1300 m², distributed over the roofs of the three buildings. The heat from the PVT plant is primarily used for ground source regeneration, but it can also be used to provide heat directly for the evaporator of the heat pump.

Within this 5 years P&D project the interaction of the entire heating system will be optimized and the long term temperature development and behavior of the ground source with solar regeneration will by observed.

SPF contact person

THRIVE – Thermally driven adsorption heat pumps for substitution of electricity and fossil fuels

This project focuses on the use of a thermal driven adsorption heat pump using waste heat stemming from industrial processes.
This project is supported by the Swiss National Science Foundation (SNSF). IBM research is leading the umbrella project; in addition to the SPF (adsorption heat pump development), the EMPA (Building Energy Materials and Components), the ETH Zürich (Complex Materials), the HEIG-VD (Solar Energetics and Building Physics) as well as the PSI (Technology Assessment Group) are implied in subparts of this project.

SPF contact person

COMTES – Combined development of compact seasonal thermal energy storage technologies

COMTES main purpose is the development and demonstration of various techniques enabling to store heat over a long period (seasonal storage) with a high energy density and with less losses than conventional water storage. This should enable to increase the building heat solar fraction coverage.At SPF, investigation are lead on an absorption/desorption concept using sodium hydroxide (NaOH) and water as thermochemical heat storage mediums. EMPA and Kingspan Renewables are SPF main project partner in this subproject line. The project is supported European Union's in the frame of the FP7 Research and Innovation funding programme (FP7, Project no. 295568).

SPF contact person

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